Gale Cooper's The Coroner's Jury Report of Billy the Kid: The Inquest that Sealed the Fame of Billy Bonney and Pat Garrett, 436 pages in Hardcover and Paperback, proves that it takes just that one Report to end all the Billy the Kid imposter hoaxes. This is the definitive book on that Report, which identified Pat Garrett's July 14, 1881 Fort Sumner victim as William Bonney, "the Kid." Given are the circumstances of that Coroner's Jury Report's writing, its proper filing with San Miguel County court records, and its basis for Pat Garrett's collecting his reward. The book also debunks the 20^th century Billy the Kid imposter hoaxes of "Brushy Bill" Roberts and John Miller, which were based on denying that Garrett fatally shot the Kid on July 14, 1881, claimed he killed an innocent victim instead, and lied that Billy survived to old age as themselves. Also hoaxbusted are the 21^st century "Billy the Kid Case" hoax and the "Cold Case Billy the Kid" megahoax, built on those old imposters' lies, with more added. The author is a Billy the Kid expert, author of many history and hoaxbusting books on the subject. She is a Harvard Medical School educated M.D. forensic psychiatrist.